I have: 25a (Plant stage performer on outskirts of Finchley (7) as FACTORY) 28a (Energy at the back made Brunel's "Great" (7) as EASTERN - originally thought WESTERN, but that didn't seem to work) 25d (Extremely rare unusual fake takes in curator finally (5) as FREAK
28a This should be BRITAIN, as the Great Britain was the first ocean going 'liner' fitted with a screw propellor (which is at the back). Great Western had paddlewheels and Gt. Eastern had both!
No, we are talking the 3 ships Brunel built. You don't have energy at the back of a steam locomotive. The original Great Western was his idea to extend the Great Western Railway to New York.